- L0pht Heavy Industries: http://www.l0pht.com/
- THC - The Hacker´s Choice: http://thc.pimmel.com/
- The Cult of the Dead Cow: http://www.cultdeadcow.com/
- Chaos Computer Club: http://www.ccc.de/
- !Hispahack: http://hispahack.ccc.de/
- Underground ORG: http://underground.org/
- Rhino9 - Security Research Team: http://rhino9.technotronic.com/
- r00t: http://www.r00t.org/
- Els Apostols: http://www.apostols.org/
- HERT Computer Security Research: http://www.hert.org/
- Blackbrains Team: http://www.blackbrains.org/
- 8LGM Group: http://www.8lgm.org/
- Rhino9: Security Research Team: http://207.98.195.250/
© 2002 Antonio Villalón Huerta